PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A heterozygous parent and a homozygous dominant parent have offspring. What is the probability that any one offspring will be homozygous?
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25 percent
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50 percent
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75 percent
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100 percent
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Explanation:
Detailed explanation-1: -If two heterozygotes are crossed, the probability that an offspring will be homozygous recessive is 25% or 0.25. Homozygous dominant: 25% or 0.25.
Detailed explanation-2: -In a cross involving two heterozygous parents, which is the chance of the offspring having the dominant phenotype? In a cross between two homozygous dominant individuals, 25% of the offspring may have the recessive phenotype. Incomplete dominance occurs when the recessive allele is not completely dominant.
Detailed explanation-3: -In other words, there is a 100% probability that an offspring of such a pairing will exhibit the dominant phenotype.
There is 1 question to complete.